Wed, 25 Apr 2012, 17:37
Active lava flows continue to advance on Kīlauea's coastal plain and have now entered the narrow coastal strip of the National Park known as the Kalapana extension, reaching within 0.9 km /0.6 mi of the Pacific Ocean. Access to this area from the end of Chain of Craters Road within the National Park is estimated to be 8-9km / 5-6 miles EACH WAY, while only about 3 miles each way from the typically upwind Kalapana side (which requires private land access).
Wed, 25 Apr 2012, 06:00IG reported that during 25-30 April visual observations of Tungurahua were occasionally limited due to cloud cover. On 27 April a steam-and-ash plume rose 200 m above the crater and drifted WNW. On 30 April tremor was detected then followed by an ash plume that rose 4 km above the crater and drifted WNW.
Wed, 25 Apr 2012, 06:00
MVO reported that during 20-27 April activity at the Soufrière Hills lava dome was at a low level. Observations on 24 April revealed fresh rockfall and pyroclastic flow deposits SW, at the head of Gingoe's Ghaut. The Hazard Level remained at 2.
Wed, 25 Apr 2012, 06:00KVERT reported that explosive activity at Shiveluch continued during 20-27 April. Ground-based observers and satellite imagery indicated that a viscous lava flow continued to effuse in the crater formed during a 2010 eruption and was accompanied by fumarolic activity. Seismic data and visual observations showed that ash plumes rose to an altitude greater than 10 km (32,800 ft) a.s.l. on 24 April and were slight on the other days.
Wed, 25 Apr 2012, 06:00
INSIVUMEH reported that on 25 April a lahar traveled down Santa María's Rio Nima II drainage, carrying 1.5-m-wide blocks and tree branches. During 30 April-1 May white plumes rose 300-600 m above the lava dome. Lava flows continued to produce avalanches that descended the flanks.
Wed, 25 Apr 2012, 06:00According to INGEOMINAS, the Observatorio Vulcanológico and Sismológico de Manizales reported that during 25-26 and 28-30 April video data and observers in the city of Manizales (25 km NW) indicated that gas-and-steam plumes rose .5-2 km above Nevado del Ruiz's crater. Cloud cover prevented observations on 27 April. Seismic signals indicated that an ash plume was emitted at 1248 on 30 April however cloud cover prevented observations.
Wed, 25 Apr 2012, 06:00
During 25 April-1 May HVO reported that the circulating lava lake periodically rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. Frequent measurements indicated that the gas plume from the vent continued to deposit variable amounts of ash, and occasionally fresh spatter, nearby. Incandescence was visible from both a lava pond in a small pit on the E edge and a small spatter cone on the SE edge of the Pu'u 'O'o crater floor, and on the upper part of the lava-tube system on the E flank.
Wed, 25 Apr 2012, 06:00KVERT reported that moderate seismic activity from Karymsky continued to be detected during 20-27 April, and indicated that possible ash plumes rose to an altitude of 2.5 km (8,200 ft) a.s.l. during 20 and 24-25 April. Satellite imagery showed a daily thermal anomaly on the volcano.
Wed, 25 Apr 2012, 06:00
Sezione di Catania - Osservatorio Etneo reported that the twenty-fifth paroxysmal eruptive episode since January 2011 took place at New SE Crater (New SEC) of Etna during the morning of 24 April following about 11 days of quiescence. During 21-22 April a series of small ash emissions observed by web cameras drifted downslope to the E. On 22 April prolonged emissions of white vapor rose from an area in the upper portion of the fissure that cuts the SE flank of the cone.
Read all
Wed, 25 Apr 2012, 06:00PHIVOLCS reported that the Alert Level for Bulusan was lowered to 0 (on a scale of 0-5) on 24 April following a decline in activity after a phreatic eruption on 13 May 2011. The frequency of earthquakes decreased to baseline levels of 0-2 per day, measurements indicated deflation since late November 2011, and steaming activity from the crater and known thermal vents had been frequently weak compared to more moderate steam emissions during periods of unrest. Entry into the permanent danger zone, defined by a 4-km radius around the volcano, remained prohibited.
Read all
Wed, 25 Apr 2012, 06:00
Based on information from JMA, the Tokyo VAAC reported that during 24 April-1 May explosions from Sakura-jima produced plumes that rose to altitudes of 1.8-2.7 km (6,000-9,000 ft) a.s.l. and drifted in multiple directions. A pilot observed an ash plume on 26 April that rose to an altitude of 2.7 (9,000 ft) a.s.l.
Read all
Wed, 25 Apr 2012, 06:00CENAPRED reported that gas-and-steam plumes, occasionally containing ash, rose from Popocatépetl during 25-29 April. Gas-and-ash plumes rose 1.5 km above the crater on 25 and 27 April. On 28 April incandescent fragments ejected from the crater landed on E flank as far as 1 km.
Read all
Wed, 25 Apr 2012, 06:00
According to the Darwin VAAC, ash plumes from Lokon-Empung, that rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted 75 km N, were detected in satellite imagery and reported by ground-based observers.
Read all
Wed, 25 Apr 2012, 06:00According to a JMA report on 2 May, an eruption at Ioto (Iwo-jima) caused water discoloration to the NE. A new fumarole was also confirmed.
Read all
Wed, 25 Apr 2012, 06:00
AVO reported that elevated surface temperatures were detected over Cleveland in satellite imagery during 25-29 April and possibly on 30 April. Observations showed that a small lava dome, 25 m across, had recently been emplaced.
Read all
Wed, 25 Apr 2012, 06:00Based on analyses of satellite imagery, the Darwin VAAC reported that during 25-26 April ash plumes from Batu Tara rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 37 km W and SW. During 30 April-1 May ash plumes again rose to an altitude of 2.4 km (8,000 ft) a.s.l. then drifted 37-55 km NW.
Read all
Mon, 23 Apr 2012, 20:17
11 days following the last eruption, the 25th paroxysm of Etna's New SE crater is happening at the time of writing in the evening 23 April. It started around 16:00 hrs local time with week Strombolian explosions accompanied by a steeply increasing tremor.
Fri, 20 Apr 2012, 22:12Weak ash emissions from deep strombolian activity within the New SE crater has been observed since last evening (20 April). If the eruption patterns remains more or less the same, a new paroxysm is probably under way within the next days.
Thu, 19 Apr 2012, 16:19
The past week was characterized by an important increase of Popocatéptl volcano's activity in Mexico and one of the Etna's most spectacular recent episodes of fire fountaining.
Read all
Thu, 19 Apr 2012, 10:05Seismicity at Nevado del Ruiz decreased during 11-15 April then slightly increased during 16-17 April, but remains at elevated levels.
Read all
Thu, 19 Apr 2012, 10:05
Explosive activity at Shiveluch continued during 7-13 April. Ground-based observers and satellite imagery indicated that a viscous lava flow continued to effuse in the crater formed during a 2010 eruption.
Read all
Thu, 19 Apr 2012, 10:05Our friend Richard Roscoe visited Sakurajima volcano from 8-11 April and observed vulcanian eruptions from the Showa crater: www.photovolcanica.com. It was noted that the crater was approximately 20% wider from N to S that in the beginning of 2010.
Thu, 19 Apr 2012, 10:05
Almost daily small plumes were observed during the past week rising less than 1 km. Incandescence at crater was observed from 10-11 April.
Thu, 19 Apr 2012, 10:05Minor steam-and-gas plumes from Pagan were observed in satellite images during clear periods from 6 to 13 April.
Thu, 19 Apr 2012, 10:05
During 7-13 April moderate seismic activity from Karymsky continued to be detected, and indicated that possible ash plumes rose to an altitude of 2.5 km (8,200 ft) a.s.l.
Read all
Thu, 19 Apr 2012, 10:05The weekly Smithsonian/USGS volcanic activity report summarizes the recent increase of Popocatépetl volcano as follows:
Read all
Thu, 19 Apr 2012, 10:05
Thu, 19 Apr 2012, 07:04
eruption plume from Reventador on 18 April (photo: L. Gomezjurado / IG)
Reventador continues to be mildly active with ongoing weak to moderate steam and ash emissions. The Instituto Geofísico reports a 2 km high column of steam and ash rising from Reventador volcano on 18 April. The ash cloud moved to the NW.
Read all
